US9217875B1ActiveUtility
Multi-view auto-stereoscopic display and angle magnifying screen thereof
Est. expiryOct 29, 2034(~8.3 yrs left)· nominal 20-yr term from priority
Inventors:June-Jei Huang
G02B 30/27G03B 35/22G02B 30/40G03B 35/24G03B 21/625G02B 3/0068G02B 13/16G02B 3/0056G02B 27/2214G02B 27/2221G02B 30/29
78
PatentIndex Score
3
Cited by
10
References
13
Claims
Abstract
A multi-view auto-stereoscopic display is provided. The display includes an angle-magnifying screen for magnifying the view angle of an image light beam from a projection head. The angle-magnifying screen includes a first lens unit, a central lens unit, and a second lens unit arranged sequentially. The first lens unit is configured for receiving the image light beam. The central lens unit is configured for redirecting the image light beam from the first lens unit to the second lens unit. The second lens unit is configured for magnifying the view angle of the image light beam.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. An angle-magnifying screen, adapted to receive an image light beam from a projection lens, the angle-magnifying screen comprising:
a first lens unit, comprising a plurality of first lenticular lenses each having a first focal length, wherein the first lenticular lenses are arranged along a predetermined direction and are separated from one another by a first distance;
a second lens unit, comprising a plurality of second lenticular lenses each having a second focal length, wherein the second lenticular lenses are arranged along the predetermined direction and are separated from one another by a second distance;
a central lens unit, positioned between the first lens unit and the second lens unit and separated from the first lens unit by a distance of the first focal length,
wherein the central lens unit comprises a plurality of central lenticular lenses each having a third focal length, and the central lenticular lenses arranged along the predetermined direction and separated from one another by a third distance, wherein the third distance satisfies the following equation:
P
M
=
P
A
T
D
⨯
(
T
D
+
f
a
-
f
m
)
in which P M is the third distance, P A is the first distance, TD is a projection length of the image light beam from the projection lens to the angle-magnifying screen, f a is the first focal length, and f m is the third focal length.
2. The angle-magnifying screen as claimed in claim 1 , wherein the second distance satisfies the following equation:
P
B
=
P
A
N
*
(
T
D
+
f
a
)
T
D
in which N is a natural number greater than or equal to 1.
3. The angle-magnifying screen as claimed in claim 1 , wherein the first lenticular lenses comprise a first axial lens, and the second lenticular lenses comprise a second axial lens, wherein the optical axis of the first axial lens and the optical axis of the second axial lens are arranged in a main axis.
4. The angle-magnifying screen as claimed in claim 3 , wherein along the predetermined direction, the first lens unit comprises X first lenticular lenses counting from the first one of the first lenticular lenses which is adjacent to the first axial lens, and
wherein along the predetermined direction, the second lens unit comprises X second lenticular lenses counting from the first one of the second lenticular lenses which is adjacent to the second axial lens,
wherein the optical axis of a Y-th second lenticular lens is offset from the optical axis of a Y-th first lenticular lens by a shifting value, and the shifting value satisfies the following equation:
O Y =Y*[P B *N−P A ]
in which Oy is the shifting value, Y is smaller than or equal to X, and N is a natural number greater than or equal to 1.
5. The angle-magnifying screen as claimed in claim 4 , wherein a projection length of the image light beam from the projection lens to the angle-magnifying screen satisfies the following equation:
TD≧f a /O Y *W/ 2
in which W is a width of the first lens unit along the predetermined direction.
6. The angle-magnifying screen as claimed in claim 1 , wherein the first focal length equals to the third focal length.
7. The angle-magnifying screen as claimed in claim 1 , wherein the first focal length is greater than the second focal length.
8. The angle-magnifying screen as claimed in claim 1 wherein the central lens unit is spaced from the second lens unit by a distance of the second focal length.
9. The angle-magnifying screen as claimed in claim 1 , further comprising a plurality of light blocking elements each positioned between the two neighboring lenticular lenses.
10. The angle-magnifying screen as claimed in claim 1 , comprising a plurality of second lens units, and the second lens units are adjacent to one another along the predetermined direction.
11. A multi-view auto-stereoscopic display, comprising:
a projection lens, configured to receive an image light beam; and
an angle-magnifying screen, configured to receive the image light beam from the projection lens and comprising:
a first lens unit, comprising a plurality of first lenticular lenses each having a first focal length, wherein the first lenticular lenses are arranged along a predetermined direction and are separated from one another by a first distance;
a second lens unit, comprising a plurality of second lenticular lenses each having a second focal length, wherein the second lenticular lenses are arranged along the predetermined direction and are separated from one another by a second distance;
a central lens unit, positioned between the first lens unit and the second lens unit and separated from the first lens unit by a distance of the first focal length,
wherein the central lens unit comprises a plurality of central lenticular lenses each having a third focal length, and the central lenticular lenses are arranged along the predetermined direction and separated from one another by a third distance, wherein the third distance satisfies the following equation:
P
M
=
P
A
T
D
⨯
(
T
D
+
f
a
-
f
m
)
in which P M is the third distance, P A is the first distance, TD is a projection length of the image light beam from the projection lens to the angle-magnifying screen, f a is the first focal length, and f m is the third focal length.
12. The multi-view auto-stereoscopic display as claimed in claim 11 , wherein the first lens unit and the central lens unit are formed integrally, the first lens unit is at a side of the angle-magnifying screen that is close to the projection lens, and the central lens is at a side of the angle-magnifying screen that is away from the projection lens.
13. The multi-view auto-stereoscopic display as claimed in claim 11 , wherein the angle-magnifying screen comprises a plurality of second lens units, and the second lens units are adjacent to one another along the predetermined direction.Cited by (0)
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